<?php
/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 15-3-18
 * Time: 上午11:50
 */

//当前URL
function getCurrentUrl() {
    return $_SERVER['SERVER_NAME'].($_SERVER["SERVER_PORT"] != '80' ? ':'.$_SERVER["SERVER_PORT"] : '').$_SERVER["REQUEST_URI"];
}

//获取IP
function getIP(){
    if (!empty($_SERVER['HTTP_CDN_SRC_IP'])){ //ip from cdn
        $ip = $_SERVER['HTTP_CDN_SRC_IP'];
    }elseif (!empty($_SERVER['HTTP_CLIENT_IP'])){ //check ip from share internet
        $ip = $_SERVER['HTTP_CLIENT_IP'];
    }elseif (!empty($_SERVER['HTTP_X_REAL_IP'])){ //check ip from share internet
        $ip = $_SERVER['HTTP_X_REAL_IP'];
    }elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])){  //to check ip is pass from proxy
        $ips = explode (", ", $_SERVER['HTTP_X_FORWARDED_FOR']);
        for ($i = 0; $i < count($ips); $i++) {
            if (!eregi ("^(10|172\.16|192\.168)\.", $ips[$i])){
                $ip = $ips[$i];
                break;
            }
        }
    }else{
        $ip = $_SERVER['REMOTE_ADDR'];
    }
    return $ip;
}

function isIdcard($idcard){
    return preg_match('/^\d{6}((1[89])|(2\d))\d{2}((0\d)|(1[0-2]))((3[01])|([0-2]\d))\d{3}(\d|X)$/i',$idcard);
}

function isTel($tel){
    return preg_match('/^1[0-9]{10}$/', $tel);
}

function isEmail($email) {
    return preg_match('/^[\w\-\.]+@[\w\-]+(\.\w+)+$/i', $email);
}

function isMobile($mobile){
    return preg_match('/^((\(\d{3}\))|(\d{3}\-))?13\d{9}$/', $mobile);
}

/**
 * 简单的生成缩略图函数（支持图片格式：gif、jpeg、png和bmp）
 * @author  xiaoshuoit@163.com
 * @param   string  $src        源图片路径
 * @param   int     $width      缩略图宽度（只指定高度时进行等比缩放）
 * @param   int     $width      缩略图高度（只指定宽度时进行等比缩放）
 * @param   string  $filename   保存路径（不指定时直接输出到浏览器）
 * @return  bool
 */
function simple_thumb($src, $width = null, $height = null, $filename = null) {
    if (!isset($width) && !isset($height))
        return false;
    if (isset($width) && $width <= 0)
        return false;
    if (isset($height) && $height <= 0)
        return false;

    $size = getimagesize($src);
    if (!$size)
        return false;

    list($src_w, $src_h, $src_type) = $size;
    $src_mime = $size['mime'];
    switch($src_type) {
        case 1 :
            $img_type = 'gif';
            break;
        case 2 :
            $img_type = 'jpeg';
            break;
        case 3 :
            $img_type = 'png';
            break;
        case 15 :
            $img_type = 'wbmp';
            break;
        default :
            return false;
    }

    if (!isset($width))
        $width = $src_w * ($height / $src_h);
    if (!isset($height))
        $height = $src_h * ($width / $src_w);

    $imagecreatefunc = 'imagecreatefrom' . $img_type;
    $src_img = $imagecreatefunc($src);
    $dest_img = imagecreatetruecolor($width, $height);
    imagecopyresampled($dest_img, $src_img, 0, 0, 0, 0, $width, $height, $src_w, $src_h);

    $imagefunc = 'image' . $img_type;
    if ($filename) {
        $imagefunc($dest_img, $filename);
    } else {
        header('Content-Type: ' . $src_mime);
        $imagefunc($dest_img);
    }

    imagedestroy($src_img);
    imagedestroy($dest_img);
    return true;
}